Panasonic CU-E18CKR Service Manual page 93

memory (abnormality detected), four "beep" sounds will be heard
and Power LED will light on. Otherwise, one "beep" sound is
heard.
If "CHECK" button is press again during Cooling operation using test run operation mode for
30 seconds, the diagnosis mode will turn off.
Error Codes Table
Abnormality / Protection control
Diagnosis
display
Indoor / outdoor abnormal
H11
communication
H14 Indoor intake air temperature
sensor abnormality
H15 Outdoor compressor
temperature sensor
abnormality
H16 Outdoor Current Transformer
open circuit
H19 Indoor fan motor merchanism
lock
H23 Indoor heat exchanger
temperature sensor
abnormality
H26 Ion abnormality
H27 Outdoor air temperature
sensor abnormality
H28 Outdoor heat exchanger
temperature sensor
abnormality
H30 Discharge temperature sensor
abnormality
H33 Indoor/Outdoor wrong
connection
H97 Outdoor Fan Motor lock
abnormality
H98 Indoor high pressure
protection
H99 Indoor heat exchanger anti-
freezing protection
Abnormality Emergency
Judgement operation
> 1 min after Indoor fan
starting operation only
operation
Continue for 5
sec.
Continue for 5
sec.
—
—
Continue for 5
sec.
(Cooling only)
—
Continue for 5
sec.
Continue for 5
sec.
Continue for 5
sec.
—
—
—
—
Primary location to
-
Internal / external cable connections
-
Indoor / Outdoor PCB
-
—
Intake air temperature sensor
or disconnected)
-
—
Compressor temperature sensor
(defective or disconnected)
-
—
Outdoor PCB
-
IPM (Power transistor) module
-
—
Indoor PCB
-
Fan motor
-
O
Heat exchanger temperature
(defective or disconnected)
-
—
Indoor PCB
-
Ionizer
O -
Outdoor temperature sensor
or disconnected)
-
O
Outdoor heat exchanger temperature
sensor (defective or disconnected)
-
—
Discharge temperature sensor
-
—
Indoor/Outdoor supply voltage
-
—
Outdoor PCB
-
Outdoor Fan Motor
-
—
Air filter dirty
-
Air circulation short circuit
-
—
Insufficient refrigerant
-
Air filter dirty